Pop valve



July 5, 193 v s. B. DUFFIELD 1,365,560.

POP VALVE Filed Jan. 29, 1926 Patented Jul 1932 UNITED STATES PATENT OFFICE GEORGE B. DUI'I'IELD, OI DETROIT, MICHIGAN, ASSIGNOB T0 DETROIT L'UBBIOATOB GOHPANY, OI DETROIT, MICHIGAN, A CORPORATION OF MIOHIGAH POP VALVE Application filed January 28, 1986. Serial No. 84,744.

The invention relates to valve construc tion and more articularly to an improved form of pop sa et valve wherein a springpressed valve mem er is axially movable relative to its seat.

The principal ob ect of the lnvention is to provide a construction in wh1ch the valve member and the actuating handle therefor may be rotatably adjusted to any des red position throughout a complete revolution. To this end the conventional form of pop valve has been considerably modified and various new features of construction have been introduced as hereinafter set forth.

In the drawing:

Figure 1 is an axial section through the valve.

Figu line 22 of Figure 1.

The improved valve comprises a body 1 having an axial fiuid passageway 2 therethrough and provided with a seat 3 preferably of conical form. A series of spaced gucides 4 project radially inward into the passageway 2, leaving longitudinal passageways 5 between adjacent guides. 6 is the valve member preferably formed as a cupshaped sheet metal stamping having an upper cylindrical ortion 7, a tapering valve portion 8 and a epending cylmdrlcal portion 9 of reduced diameter, adapted to slide in the guides 4. The lower end of the valve member is closed by the bottom wall 10, while the upper end is open. The tapering portion 8 of the valve member is adapted to contact with the seat 3 of the bod member, and to insure a tight seal, the b0 y has cut away portions 11 and 12 above and below the conical seat.

The bod is also provided with a series of outwar 1y projecting lugs 13 which are threaded to engage an outer shell 14, the latter being preferably of substantially bell shaped form ov n at its lower end. For actuating the va ve member 6 there is" a stem 15 secured at its lower end to the valve member and rojecting upwardly through the shell 14. This stem has a rounded lower end 16 contacting with the bottom wall 10 6D and is provided with shoulders 17 arranged re 2 is a cross section thereof on'the slightly below the shoulders 18 in the valve member. 19. is a retaining washer adapted to be inserted between the above mentioned shoulders, thereby uniting the valve and stem and forming a single unit. Sleeved upon the upper end of the stem within the shell 14 is a coil spring 20 held by the retaining washers 21' and 22, the former bearing against the shell 14 and the latter being seated on the annular shoulder 22' formed on the stem. This spring normally holds the valve member 6 in engagement with its seat. For openin the valve there is a lever 23 pivotally secure to the portion of the stem 15 pro'ecting through the shell by a pin 24 and re erably arranged in a slot in said stem. 6ne end of this lever has a cam portion 25 adapted to bear upon a washer 26 on the top of the shell 14. The other end of the lever is bent downwardly to conform substantially to the shape of the shell 14 and is provided with an aperture 26 for receivin the operating mechanism for the valve. hus an outward pull on the lever 23 will cause said lever 'to fulcrum on the cam 25 and impart a longitudinal movement to the valve member 6 in opposition to the resistance of the spring 20.

The lower end of the body member 1 is provided with a tapering thread for. engagement with a standard extension'piece 27, which inturn is provided with a standard pipe thread 28. It is obvious, however, that if desired this extension ma be made inte ral with the body member. he upper sur ace of the body member has the downwardly sloping surface 29 to prevent the retention of the fluid and the lugs 13 have the oppositely inclined surfaces 30 for the same purpose.

In the operation of the valve as above described the valve member 6 is normally held seated by the spring 20 but b means of an outward pull on the lever 23 t e valve member is moved axially with respect to its seat and the fluid then passes upwardly through the channels 5 between the guides 4, into the interior of the shell 14 from where it discharges downwardl through the apertures between the s ace lugs 13 and the shell. By reason of t e fact that the valve member is cylindrical and rotatable in the body of the valve both the valve and the actuatin lever may be rotatably adjusted into any esired position throughout a complete revolution.

The valve is of course designed to normally function as a safety valve so that when the pressure in the passageway 2 exceeds the resilient pressure due to the tension of the spring 20, the valve member 6 will be automatically lifted from its seat to permit escape of the fluid through the shell. For adjusting the pressure at which the valve is set to operate automatically, it is only necessary to rotate the shell 14 with respect to the threaded lugs 13, thus increasing or diminishing the resilient pressure upon the valve member. determined pressure the shell is preferably locked to the body by means of a set screw extending through the shell into one of 2.15; lugs 13, this set screw preferably having an undercut head 32 which is twisted off to prevent further adjustment of the valve.

One of the features of the construction as above described is the arrangement whereby the resilient pressure is transmitted directly to the lowermost portion of the valve member 6, since this point is located a considerable distance below the seat. This arrangement insures a better alignment of the valve member with its seat and prevents any tendency to tilt the valve so as to form an imperfect seal. In the larger sizes of valves where the diameter of the cylindrical portion 9 is greater, more clearance is provided between the interior of the cylindrical portion and the lower end of the stem 15. In such constructions the spring 20 may extend still further downward so as to engage the inwardly projecting shoulders 18. In either case, however, the pressure is transmitted directly to the lower portion of the valve member and insure the proper seating of the valve.

What I claim as my invention is:

1. In a valve, the combination with an outer shell, of a hollow body within said shell provided with a valve seat, spaced lugs connecting said body and shell, guides projecting inwardly from said hollow body, an axially movable valve member co-operating with said seat and having a depending portion engaging said guides, said valve member having a stem projecting through said shell, and a lever attached to said valve stem outside of saidshell, said valve stem and lever being rotatablyiadjustable through a complllete revolution with respect to said body and s ell.

2. In a valve, the combination of a body having a longitudinal passageway therethrough and provided with a seat, guides projecting inwardly into said passageway, a cylindrical valve member having a portion slidable and rotatable in said guides and having a portion co-operating with said seat, a stem rising upwardly from said valve mem- When the valve. is adjusted to a pre-.

ber, a s ring sleeved on said stem, a shell attache to said body, a lever pivotally connected to said stem and fulcrumed on said shell, said valve member and lever being unrestrictedly rotatably adjustable independently of the axial movement -of said valve member.

3. In a valve, the combination with a body having a longitudinal passageway therethrough and provided with a seat above said passageway, of a valve member guided in sa d longitudinal passageway and engageable with said seat, means for resiliently urging said valve member into en agement with said seat, and means anchore interiorly of said valve member for raising the same from its seat said valve member comprising a sheet metal stamdping having a cylindrical guide portion an a conical seat-engaging portion.

4. In a valve, the combination with a body having a longitudinal passageway therethrough and provided with a seat above said passageway, of a valve member guided in said longitudinal passageway for independent rotative and axial movements, and a stem for actuating the valve member,.said valve member comprising a hollow sheet metal stamping closed at its lower end and provide with a flaring portion en geable with said seat the said valve member eing further provided with means adjacent its closed end or anchoring the actuating stem thereto.

5. In a valve, the combination with a body having a assageway therethrough and provided wit a seat, of a sheet metal valve member comprising a cylindrical lower portion closed at its lower end and shaped interiorly to accommodate attachment of an actuating stem, the said lower portion being slidable in said passageway, an outwardly flaring ortion above said cylindrical portion an a cylindrical portion of larger diameter extending upwardly from said flaring portion.

6. In a valve, the combination with a body having a passagewaytherethrough and provided with a conical seat, of a shell attached to said body and inclosing the upper portion of the same, guides projecting inwardly from said body into said passageway, a valve member having a cylindrical lower portion engaging said guides, said valve member having also a conical portion adapted to engage said seat, a stem attached to said valve member and projecting upwardly through said shell, 9. spring sleeved on said stem and abutting said shell, means on said stem for engaging said spring, a lever pivotally secured to said stem, and a cam on said lever, said shell being provided with an annular surface co-operating with said cam to form a fulcrum for said lever, said valve member and lever being adapted for unlimited r0- tative adjustment without axial movement.

7. In a valve, the combination with a body and an operatin lever mounted on said stem having a passageway therethrough and proadjacent said shield and adapted to fulcrum vided with a seat, of a valve member, said thereon, the said operatin lever and stem valve member comprising a hollow sheet being unrestrictedly rotata ly adjustable.

metal stamping provided with a cylindrical portion closed at its lower end and a flaring portion for engagement with the said seat, a shoulder within the c lindrical portion of the valve member, ad acent the closed end thereof, a stem extending upwardly from the valve member, a shoulder adjacent the lower end of said stem and a washer between the shoulder on the cylindrical ortion of the valve member and the shoul er on the said stem for connecting the said stem to the valve member.

8. In a valve, the combination with an outer shell provided with internal screw threads, of a body having a passageway therethrough and provided with a seat, the said body being also provided with a threaded portion for engagement with the internal threads in the shell, a valve member engageable with the said seat, a stem projecting upwardly from the valve member and through the said shell, 9. pair of shoulders formed on the said stem, means within said valve member engageable with one of said shoulders for securing said stem to said valve member, a spring sleeved on said stem between the other of said shoulders and the top of the shell, whereby rotation of the shell increases the compression of the spring, and an operating lever pivotally connected to the said stem exteriorly of the shell, the said level being adapted for unrestricted rotative adjustment with respect to the said shell.

9. In a valve, a hollow body having a valve seat, a valve cooperable with said valve seat, a spring for urging said valve to its seat,.a shield overlying said hollow body and having an aperture therein, said shield constituting an abutment for one end of said spring and being fixed to said hollow body, a stem for said valve projecting through said aperture and into said valve, means within said valve for securing the stem to the valve and an operating lever mounted on said stem adjacent said shield and adapted to fulcrum thereon, the said operating lever being unrestrictedly rotatably adjustable with re spect to the said shield.

10. In a valve, a hollow body having a valve seat, a cup-shaped valve cooperable with said valve seat, a spring for urging said valve to its seat, a shield overlying said hollow body and having an aperture therein,

00 a stem for said valve for moving the same toward or away from its seat, the said stem projecting through the said aperture, a shoulder within said valve, a second shoulder on said stem, means cooperating with said shoulders for securing the stem to the valve In testimony whereofI aflix m si ature.

GEORGE B. DU FI LD. 

